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Float and Sink

By Karen Cox | Affiliate Disclosure

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Try this outdoor learning activity to help kids explore and discover which things float or sink. By freely exploring with materials, children learn the scientific process. They form their own questions about why something happens, and test out their own theories.

Float and Sink Preschool Science Experiment

Materials Needed:
Tubs of water (one for every pair of children)
Small items that will float
Small items that will sink
Towels

Set Up:
Fill tubs with water. Gather float and sink items, and sort them into bowls or containers.

Float and Sink Preschool Science Experiment

Procedure:
Give each pair of children a tub of water, and tell them they are going to test several things to see if they will float or sink. Pass each child a bottle cap, and ask them to make a prediction whether they think the cap will float or sink.  Ask them to place the bottle cap in the water to see what happens. Have children test each of the items in the same manner, making a prediction first, then testing them. Do not pass out all of the items at once; instead, pass them out one at a time, randomly. Each child gets their own item to test in the water, but each pair of children shares a tub of water.

Examples of things that sink:
Pebble
Penny
Marble
Toy fish (like a math manipulative fish)

Examples of things that float:
Bottle Cap
Feather
Unifix cube
Small piece of paper

I usually do this activity during my Ocean Theme (find more activities here).

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2 Comments

About Karen Cox

Karen is the founder of PreKinders.com. She also works as a full-time Pre-K teacher in Georgia. Read more...

Reader Interactions

Comments

  1. Jenn Catron says

    January 23, 2013 at 12:32 pm

    I just did a sink or float experiment with my PreK Kids. We started out with several of the items listed to see if they would sink or float. We used our empty milk cartons from breakfast to make boats. Then used counting bears to see how many it would take to make it sink. The kids LOVED it!!

    Reply
  2. latesha ellis says

    March 7, 2013 at 3:40 pm

    i did the float and sink project the kids really enjoyed it and so did i we was finding all kinds of things to put in the water we even had sea shells we put in the water trees,leaves,things we found in the classroom we had a lot of fun please info. me of more science projects in the future thats dealing with water thanks i enjoy looking at your page hope to hear from you in the future for more preshool actives have a wonderful spring

    Reply

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Welcome!

Glad you're here! You'll find hands-on learning activities, themes, and printables for Pre-K, Preschool, and Kindergarten kids. I'm Karen Cox, a Pre-K teacher in Georgia. I have taught 4-5 year olds for 20+ years! Read More…

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Welcome!
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We collect, use, and process your data according to our Privacy Policy.
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Welcome!
Would you like to join my FREE weekly update newsletter? Join 85,000+ subscribers!
We collect, use, and process your data according to our Privacy Policy.
Don't worry - we never sell or share email addresses!